Yes, 24x 2.5" and no hardware RAID. Remember that Dell C systems are not for SMBs but for huge enterprise clusters, just like HP DL1xx series. These are designed to be throw-away nodes, not stand alone enterprise servers. What is your use case for looking at something other than the PowerEdge R series?

Everything about a C series is designed to be disposable. Everything. Non-redundant parts, cheaper parts. This is literally a disposable node design, like a BackBlaze POD. This is designed exclusively for situations where you have many redundant nodes and you don't care if one or two just die on you.